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EC-742 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] P0420, P0430 THREE WAY CATALYST FUNCTION Check the following items. Refer to OK or NG OK >> GO TO 5. NG >> Follow the instructions on . 5. CHECK FUEL INJECTOR 1. Stop engine and then turn ignition switch ON. 2. Check voltage between ECM terminals 21, 22, 23, 40, 41, 42, 44, 63 and ground with CONSULT-III or tester. OK or NG OK >> GO TO 6. NG >> Perform . 6. CHECK FUNCTION OF IGNITION COIL-I CAUTION: Never following procedure in a place with no combustible objects and good ventilation. 1. Turn ignition switch OFF. 2. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pres- sure. NOTE: Do not use CONSULT-III to release fuel pressure, or fuel pres- sure applies again during the following procedure. 3. Start engine. 4. After engine stalls, crank it 2 or 3 times to release all fuel pres- sure. 5. Turn ignition switch OFF. 6. Remove all ignition coil harness connectors to avoid the electri- cal discharge from the ignition coils. 7. Remove ignition coil and spark plug of the cylinder to be checked. Refer to . 8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder. 9. Connect spark plug and harness connector to ignition coil. 10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm between the edge of the spark plug and grounded metal portion as shown in the figure. 11. Crank engine for approximately 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion. CAUTION: • Never place the spark plug and the ignition coil within 50 cm each other. Be careful not to get an electrical shock while checking, because the electrical discharge voltage becomes 20 kV or more. • It might damage the ignition coil if the gap of more than 17 mm is made. NOTE: When the gap is less than 13 mm, a spark might be generated even if the coil is malfunctioning. Items Specifications Idle speed 650 ± 50 rpm (in P or N position) Ignition timing 15 ± 5 ° BTDC (in P or N position) Battery voltage should exist. PBIB1527E Spark should be generated. ALBIA0351ZZ PBIB2325E 2011 Pathfinder |